SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '883987a073ea1af9a3194f5a169c57612cdd341243b5bb9b742a10e583ce36ef' 
  AND token = 'NhnVOmHe+gnaHT+dTTGr8xxlMVCvHox/lvhQA7IAJ5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}